{"id":163192,"date":"2022-03-07T04:49:19","date_gmt":"2022-03-06T20:49:19","guid":{"rendered":"http:\/\/www.idc.net\/help\/163192\/"},"modified":"2022-03-07T04:49:19","modified_gmt":"2022-03-06T20:49:19","slug":"database-%e4%ba%94%e5%a4%a7%e9%87%8d%e8%a6%81%e9%9c%80%e6%b1%82-%e6%95%b0%e6%8d%ae%e5%ba%935%e4%b8%aa%e8%a6%81%e6%b1%82","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/163192\/","title":{"rendered":"Database: \u4e94\u5927\u91cd\u8981\u9700\u6c42 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Definition Language\uff09\uff0c\u4f9b\u7528\u6237\u5b9a\u4e49\u6570\u636e\u5e93\u7684\u4e09\u7ea7\u6a21\u5f0f\u7ed3\u6784\u3001\u4e24\u7ea7\u6620\u50cf\u4ee5\u53ca\u5b8c\u6574\u6027\u7ea6\u675f\u548c\u4fdd\u5bc6\u9650\u5236\u7b49\u7ea6\u675f\u3002DDL\u4e3b\u8981\u7528\u4e8e\u5efa\u7acb\u3001\u4fee\u6539\u6570\u636e\u5e93\u7684\u5e93\u7ed3\u6784\u3002DDL\u6240\u63cf\u8ff0\u7684\u5e93\u7ed3\u6784\u4ec5\u4ec5\u7ed9\u51fa\u4e86\u6570\u636e\u5e93\u7684\u6846\u67b6\uff0c\u6570\u636e\u914d\u4e4e\u5e93\u7684\u6846\u67b6\u4fe1\u606f\u88ab\u5b58\u653e\u5728\u6570\u636e\u5b57\u5178\uff08Data Dictionary\uff09\u4e2d\u3002 \u3000\u3000<\/p>\n<p>2.\u6570\u636e\u64cd\u4f5c\uff1aDBMS\u63d0\u4f9b\u6570\u636e\u64cd\u4f5c\u8bed\u8a00DML\uff08Data Manipulation Language\uff09\uff0c\u4f9b\u7528\u6237\u5b9e\u73b0\u5bf9\u6570\u636e\u7684\u8ffd\u52a0\u3001\u5220\u9664\u3001\u66f4\u65b0\u3001\u67e5\u8be2\u7b49\u64cd\u4f5c\u3002 <\/p>\n<p>3.\u6570\u636e\u5e93\u7684\u8fd0\u884c\u7ba1\u7406\uff1a\u6570\u636e\u5e93\u7684\u8fd0\u884c\u7ba1\u7406\u529f\u80fd\u662fDBMS\u7684\u8fd0\u884c\u63a7\u57f9\u5146\u6089\u5236\u3001\u7ba1\u7406\u529f\u80fd\uff0c\u5305\u62ec\u591a\u7528\u6237\u73af\u5883\u4e0b\u7684\u5e76\u53d1\u63a7\u5236\u3001\u5b89\u5168\u6027\u68c0\u67e5\u548c\u5b58\u53d6\u9650\u5236\u63a7\u5236\u3001\u5b8c\u6574\u6027\u68c0\u67e5\u548c\u6267\u884c\u3001\u8fd0\u884c\u65e5\u5fd7\u7684\u7ec4\u7ec7\u7ba1\u7406\u3001\u4e8b\u52a1\u7684\u7ba1\u7406\u548c\u81ea\u52a8\u6062\u590d\uff0c\u5373\u4fdd\u8bc1\u4e8b\u52a1\u7684\u539f\u5b50\u6027\u3002\u8fd9\u4e9b\u529f\u80fd\u4fdd\u8bc1\u4e86\u6570\u636e\u5e93\u7cfb\u7edf\u7684\u6b63\u5e38\u8fd0\u884c\u3002 <\/p>\n<p>4.\u6570\u636e\u7ec4\u7ec7\u3001\u5b58\u50a8\u4e0e\u7ba1\u7406\uff1aDBMS\u8981\u5206\u7c7b\u7ec4\u7ec7\u3001\u5b58\u50a8\u548c\u7ba1\u7406\u5404\u79cd\u6570\u636e\uff0c\u5305\u62ec\u6570\u636e\u5b57\u5178\u3001\u7528\u6237\u6570\u636e\u3001\u5b58\u53d6\u8def\u5f84\u7b49\uff0c\u9700\u786e\u5b9a\u4ee5\u4f55\u79cd\u6587\u4ef6\u7ed3\u6784\u548c\u5b58\u53d6\u65b9\u5f0f\u5728\u731c\u4e71\u5b58\u50a8\u7ea7\u4e0a\u7ec4\u7ec7\u8fd9\u4e9b\u6570\u636e\uff0c\u5982\u4f55\u5b9e\u73b0\u6570\u636e\u4e4b\u95f4\u7684\u8054\u7cfb\u3002\u6570\u636e\u7ec4\u7ec7\u548c\u5b58\u50a8\u7684\u57fa\u672c\u76ee\u6807\u662f\u63d0\u9ad8\u5b58\u50a8\u7a7a\u95f4\u5229\u7528\u7387\uff0c\u9009\u62e9\u5408\u9002\u7684\u5b58\u53d6\u65b9\u6cd5\u63d0\u9ad8\u5b58\u53d6\u6548\u7387\u3002 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